最近我开始使用GraphQL,我能够在平面模式中插入数据而没有任何问题,但当涉及到数据数组时,我得到一个错误,如
{ "errors": [ { "message": "Must be input type" } ]}
我正在使用postman测试我的查询,我的突变查询是
mutation M {
AddEvent
(
title: "Birthday event"
description:"Welcome to all"
media:[{url:"www.google.com", mediaType:"image" }]
location:[{address:{state:"***", city:"****"}}]
)
{title,description,media,location,created,_id}}
这是我的事件模式:
EventType = new GraphQLObjectType({
name: 'Event',
description: 'A Event',
fields: () => ({
_id: {
type: GraphQLString,
description: 'The id of the event.',
},
id: {
type: GraphQLString,
description: 'The id of the event.',
},
title: {
type: GraphQLString,
description: 'The title of the event.',
},
description: {
type: GraphQLString,
description: 'The description of the event.',
},
media:{
type:new GraphQLList(mediaType),
description:'List of media',
},
location:{
type:new GraphQLList(locationType),
description:'List of location',
}
})
});
// Media Type
export var mediaType = new GraphQLObjectType({
name: 'Media',
description: 'A Media',
fields: () => ({
_id: {
type: GraphQLString,
description: 'The id of the event.',
},
url:{
type: GraphQLString,
description: 'The url of the event.',
},
mediaType:{
type: GraphQLString,
description: 'The mediaTypa of the event.',
}
})
});
// Location Type
export var locationType = new GraphQLObjectType({
name: 'Location',
description: 'A location',
fields: () => ({
_id: {
type: GraphQLString,
description: 'The id of the event.',
},
address:{
type: GraphQLString,
description: 'The address.',
},
state:{
type: GraphQLString,
description: 'The state.',
},
city:{
type: GraphQLString,
description: 'The city.',
},
zip:{
type: GraphQLString,
description: 'The zip code.',
},
country:{
type: GraphQLString,
description: 'The country.',
}
})
});
猫鼬模式:
var EventSchema = new mongoose.Schema({
title: {
required: true,
type: String,
trim: true,
match: /^([w ,.!?]{1,100})$/
},
description: {
required: false,
type: String,
trim: true,
match: /^([w ,.!?]{1,100})$/
},
media: [{
url: {
type: String,
trim: true
},
mediaType: {
type: String,
trim: true
}
}],
location: [{
address: {
type: String
},
city: {
type: String
},
state: {
type: String
},
zip: {
type: String
},
country: {
type: String
}
}]
})
突变类型:
addEvent: {
type: EventType,
args: {
_id: {
type: GraphQLString,
description: 'The id of the event.',
},
title: {
type: GraphQLString,
description: 'The title of the event.',
},
description: {
type: GraphQLString,
description: 'The description of the event.',
},
media:{
type:new GraphQLList(mediaType),
description:'List of media',
},
location:{
type:new GraphQLList(locationType),
description:'List of media',
},
created: {
type: GraphQLInt,
description: 'The created of the user.',
}
},
resolve: (obj, {title,description,media,location,created,_id}) => {
let toCreateEvent = {
title,
description,
created:new Date(),
start: new Date(),
media,
location,
_id,
};
return mongo()
.then(db => {
return new Promise(
function(resolve,reject){
let collection = db.collection('events');
collection.insert(toCreateEvent, (err, result) => {
db.close();
if (err) {
reject(err);
return;
}
resolve(result);
});
})
});
}
}
您的问题是,当您定义突变时,所有类型必须是输入类型,因此您得到"Must be input type"
的错误。所以在这里(从你的突变):
media:{
type:new GraphQLList(mediaType),
description:'List of media',
},
location:{
type:new GraphQLList(locationType),
description:'List of media',
},
输入类型必须为GraphQLList
、mediaType
和locationType
。
GraphQLList
已经是一个输入类型(参见这里https://github.com/graphql/graphql-js/blob/master/src/type/definition.js#L74-L82查看作为输入类型的GraphQL类型列表)。
然而你的类型mediaType
和locationType
是GraphQLObjectType
类型,这不是一个输入类型,但如果你再看看输入类型列表:https://github.com/graphql/graphql-js/blob/master/src/type/definition.js#L74-L82,你会发现GraphQLInputObjectType
是一个对象输入类型,所以,你需要做的是用它们的"输入"版本替换mediaType
和locationType
。
我建议做的是创建mediaInputType
和locationInputType
,它们将具有与mediaType
和locationType
相同的字段结构,但使用new GraphQLInputObjectType({...
而不是new GraphQLObjectType({...
创建,并在您的突变中使用它们。
我遇到了同样的问题,我是这样解决的,如果你有任何问题,请随时评论
我遇到了同样的问题—我不知道如何在输入定义中指定对象数组。对于那些想要查看"文本"模式解决方案的人:
type Book {
title: String!
}
在你的输入类型
中有一个book数组input AuthorInput {
name: String!
age: Int!
}
您不能仅仅在输入语句中添加books: [Book!]
,您需要故意创建包含所需字段的输入类型(如果您喜欢,可以重复):
input BookInput {
title: String!
}
,然后你可以:
input AuthorInput {
name: String!
age: Int!
books: [BookInput!]
}